The executive producer of Dexter has revealed that the killer's attempts to lead a normal life have failed.

Speaking at Comic-Con, Chip Johannessen explained that Dexter will feel responsible for the death of his wife Rita (Julie Benz).

"[His attempt at a normal life] didn't just blow up, he blew it up," Johannessen said. "It's kind of like your own weaknesses come to bear on you."

He added: "His son is now possibly in the same condition that he found himself in when he was young. He's trying to pick up the pieces and at the same time he just doesn't want to do this anymore. He's reached out to humanity and it's not gone very well."